Heart's induction onto the Hollywood Walk of Fame was made extra special on Tuesday after officials in Los Angeles dedicated the day to the rockers.

Sisters Ann and Nancy Wilson unveiled their pavement plaque on Hollywood Boulevard, positioned by The Musician's Institute, in front of a huge crowd, and they were left stunned by the extra honour bestowed upon them.

Ann Wilson exclaimed, "That's a big surprise, I didn't know it was Heart day too", before joking, "Okay, everything's free for everybody all day long. Nobody pays any money for anything all day."

She added, "We'd like to say this is an incredible honour. Words can't even touch it."

Nancy told the crowd, "We're so delighted to be here today taking some credit... for all the long, hard work we do to bring a few good songs into the world.

"Songs are truly the messengers of love and it's really amazing f**king cool when the message gets through. Thanks forever to our beautiful and loyal fans. We would not be here without you."

Actress Rita Wilson was among the star guest speakers at the event, and she was full of praise for her musician pals.

In a post on her Twitter.com page, she writes, "So honored to be w/ (with) @officialheart for their Hollywood Blvd Star ceremony! Can I be the 'other' Wilson in Heart?"